Question 1

The lacA gene found within the lac operon encodes for galactosidase transacetylase.This enzyme attaches a(n) ________ group to lactose and lactose analogs.

Accepted Answer

A)  amino
B)  hydroxyl
C)  carbonyl
D)  acetyl
E)  carboxylF) A) and E)
G) B) and C)

Question 2

The ability of glucose to repress the lac operon depends on which effector molecules?

Accepted Answer

A)  allolactose
B)  cAMP
C)  tryptophan
D)  ADP
E)  starchF) B) and D)
G) A) and B)

Question 3

Histone deacetylase inhibitors are a class of drugs used as mood stabilizers and anti-epileptics that are also being researched for their efficacy as anti-cancer agents.Histone deacetylase inhibitors block the action of histone deacetylases,which remove acetyl groups from lysine residues in histone tails.How will blocking histone deacetylases affect gene expression in the cell?

Accepted Answer

A)  Chromatin will become more tightly compact,and gene expression will be reduced
B)  Chromatin will become more tightly compact,and gene expression will be increased
C)  Chromatin will become more open,and gene expression will be reduced
D)  Chromatin will become more open,and gene expression will be increased
E)  Chromatin will become more methylated,and gene expression will be decreasedF) All of the above
G) C) and D)

Exam 11: Gene Regulation

The ability of glucose to repress the lac operon depends on which effector molecules?

Correct Answer
verified

The lacA gene found within the lac operon encodes for galactosidase transacetylase.This enzyme attaches a(n) ________ group to lactose and lactose analogs.

Correct Answer
verified

Correct Answer
verified

Exam 11: Gene Regulation

The ability of glucose to repress the lac operon depends on which effector molecules?

Correct AnswerverifiedShow Answer

The lacA gene found within the lac operon encodes for galactosidase transacetylase.This enzyme attaches a(n) ________ group to lactose and lactose analogs.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified